Re: Consequences of Bias Switch Misconfiguration



On Jan 2, 9:02 pm, Ludwig77 <gregjg...@xxxxxxxxx> wrote:
I swapped out the EL34's that I had in my Mesa Lonestar Classic with
6L6's and forgot to switch the bias switch. I only ran the amp a
couple of hours. I was noticing the tone was weak and that's when I
discovered the problem.

But I also noticed that the 6L6 nearest the Rectifier tube was running
totally cold and had a gassy coating at the top. Would the incorrectly
configured bias have caused this? Or perhaps I have a bad power tube
and IT was causing this symptom.

Also, would the misconfigured bias switch cause any longer term damage
to the amp?

The amp seemed to be running fine after I corrected the bias, even
with the one cold tube. I figure this is probably because I ran the
amp at 50 watts which I understand only runs the two inner power tubes.

Nice goin'.......
.



Relevant Pages

  • Consequences of Bias Switch Misconfiguration
    ... 6L6's and forgot to switch the bias switch. ... totally cold and had a gassy coating at the top. ... Or perhaps I have a bad power tube ... to the amp? ...
    (alt.guitar.amps)
  • Re: Consequences of Bias Switch Misconfiguration
    ... 6L6's and forgot to switch the bias switch. ... totally cold and had a gassy coating at the top. ... Or perhaps I have a bad power tube ... to the amp? ...
    (alt.guitar.amps)
  • Re: Consequences of Bias Switch Misconfiguration
    ... 6L6's and forgot to switch the bias switch. ... Or perhaps I have a bad power tube ... to the amp? ...
    (alt.guitar.amps)
  • Re: Blues Jr Power Tube Overdrive?
    ... 50 watt amp would sound good and an attenuated 15 watt amp would sound ... I can't figure out why I'm not getting much power tube ... mislabeling power tube distortion as preamp distortion. ... THEN kick in the attenuator. ...
    (alt.guitar)
  • Re: fender 65 deluxe reverb amp - master?
    ... Here's the thing -- a Master Volume amp breaks down the amp into 2 controllable ... that classic power tube saturation/distortion. ... then starve the power section with a low pregain input signal (with the volume ...
    (alt.guitar)